import logging

from django.db import DatabaseError
from redis import RedisError
# from redis.exceptions import RedisError
from rest_framework import status
from rest_framework.response import Response
from rest_framework.views import exception_handler as rest_exception_handler

# 获取在配置文件中定义的logger，用来记录日志
logger = logging.getLogger('django')

def exception_handler(exc,context):
    """
    自定义异常处理
    :param exc: 异常
    :param context: 抛出异常的上下文
    :return: Response响应对象
    """
    response = rest_exception_handler(exc,context)

    if response is None:
        # context:抛出异常的上下文
        view = context['view']
        if isinstance(exc,DatabaseError) or isinstance(exc,RedisError):
            # 数据库异常
            logger.error('[%s] %s' % (view, type(exc)))
            response = Response({'message': '服务器内部错误'}, status=status.HTTP_507_INSUFFICIENT_STORAGE)
    return response